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<a href="_cigar_discus_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*!</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * </span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * \brief       Convex quadratic benchmark function.</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * </span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * </span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> *</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> * \author      -</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> * \date        -</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> *</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * \par Copyright 1995-2017 Shark Development Team</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * </span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * &lt;BR&gt;&lt;HR&gt;</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * This file is part of Shark.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * &lt;https://shark-ml.github.io/Shark/&gt;</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"> * </span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment"> * Shark is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"> * it under the terms of the GNU Lesser General Public License as published </span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment"> * by the Free Software Foundation, either version 3 of the License, or</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="comment"> * (at your option) any later version.</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="comment"> * </span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="comment"> * Shark is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span><span class="comment"> * GNU Lesser General Public License for more details.</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment"> * </span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span><span class="comment"> * You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="comment"> * along with Shark.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="comment"> *</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="comment"> */</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span><span class="preprocessor">#ifndef SHARK_OBJECTIVEFUNCTIONS_BENCHMARK_CIGARDISCUS_H</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span><span class="preprocessor">#define SHARK_OBJECTIVEFUNCTIONS_BENCHMARK_CIGARDISCUS_H</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="preprocessor">#include &lt;<a class="code" href="_abstract_objective_function_8h.html" title="AbstractObjectiveFunction.">shark/ObjectiveFunctions/AbstractObjectiveFunction.h</a>&gt;</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="preprocessor">#include &lt;<a class="code" href="_random_8h.html">shark/Core/Random.h</a>&gt;</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceshark.html" title="AbstractMultiObjectiveOptimizer.">shark</a> {<span class="keyword">namespace </span>benchmarks{<span class="comment"></span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="comment">/**</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span><span class="comment"> * \brief Convex quadratic benchmark function.</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span><span class="comment">* \ingroup benchmarks</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="comment"> */</span></div>
<div class="foldopen" id="foldopen00043" data-start="{" data-end="};">
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html">   43</a></span><span class="keyword">class </span><a class="code hl_class" href="classshark_1_1benchmarks_1_1_cigar_discus.html" title="Convex quadratic benchmark function.">CigarDiscus</a> : <span class="keyword">public</span> <a class="code hl_class" href="classshark_1_1_abstract_objective_function.html">SingleObjectiveFunction</a> {</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="foldopen" id="foldopen00046" data-start="{" data-end="}">
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a19caaa6a1eb8f079afe5d78d88543f2c">   46</a></span>    <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a19caaa6a1eb8f079afe5d78d88543f2c">CigarDiscus</a>(std::size_t <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#ade71ac99b993020d10de6a1f87e17a21" title="Accesses the number of variables.">numberOfVariables</a> = 5,<span class="keywordtype">double</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">alpha</a>=1E-3) : m_alpha(<a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">alpha</a>) {</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>        <a class="code hl_variable" href="classshark_1_1_abstract_objective_function.html#ad8888c58fd3f98e73013afb5dd4b2af1">m_features</a> |= <a class="code hl_enumvalue" href="classshark_1_1_abstract_objective_function.html#aadafeb6dfb5b649f321e7b81ac8aad1aab9262b57bb302f04b2561666a9068446" title="The function can propose a sensible starting point to search algorithms.">CAN_PROPOSE_STARTING_POINT</a>;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>        m_numberOfVariables = <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#ade71ac99b993020d10de6a1f87e17a21" title="Accesses the number of variables.">numberOfVariables</a>;</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>    }</div>
</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="comment"></span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment">    /// \brief From INameable: return the class name.</span></div>
<div class="foldopen" id="foldopen00052" data-start="{" data-end="}">
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a1e9cb8436a4c7f3b0a470469531240ff">   52</a></span><span class="comment"></span>    std::string <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a1e9cb8436a4c7f3b0a470469531240ff" title="From INameable: return the class name.">name</a>()<span class="keyword"> const</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span><span class="keyword">    </span>{ <span class="keywordflow">return</span> <span class="stringliteral">&quot;CigarDiscus&quot;</span>; }</div>
</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span> </div>
<div class="foldopen" id="foldopen00055" data-start="{" data-end="}">
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#ade71ac99b993020d10de6a1f87e17a21">   55</a></span>    std::size_t <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#ade71ac99b993020d10de6a1f87e17a21" title="Accesses the number of variables.">numberOfVariables</a>()<span class="keyword">const</span>{</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>        <span class="keywordflow">return</span> m_numberOfVariables;</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>    }</div>
</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>    </div>
<div class="foldopen" id="foldopen00059" data-start="{" data-end="}">
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a6f6615a1a19a2cc6c4ff63b9b40b60c9">   59</a></span>    <span class="keywordtype">bool</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a6f6615a1a19a2cc6c4ff63b9b40b60c9">hasScalableDimensionality</a>()<span class="keyword">const</span>{</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>        <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>    }</div>
</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>    <span class="comment"></span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span><span class="comment">    /// \brief Adjusts the number of variables if the function is scalable.</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span><span class="comment">    /// \param [in] numberOfVariables The new dimension.</span></div>
<div class="foldopen" id="foldopen00065" data-start="{" data-end="}">
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a2174c3d672907da2a808eab8cb8e5e29">   65</a></span><span class="comment"></span>    <span class="keywordtype">void</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a2174c3d672907da2a808eab8cb8e5e29" title="Adjusts the number of variables if the function is scalable.">setNumberOfVariables</a>( std::size_t <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#ade71ac99b993020d10de6a1f87e17a21" title="Accesses the number of variables.">numberOfVariables</a> ){</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>        m_numberOfVariables = <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#ade71ac99b993020d10de6a1f87e17a21" title="Accesses the number of variables.">numberOfVariables</a>;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>    }</div>
</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span> </div>
<div class="foldopen" id="foldopen00069" data-start="{" data-end="}">
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#acb893e78074c47fb828f92c7ce3d4c08">   69</a></span>    <a class="code hl_typedef" href="classshark_1_1_abstract_objective_function.html#a59bfea031628e16737c66e7117eba7b5">SearchPointType</a> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#acb893e78074c47fb828f92c7ce3d4c08" title="Proposes a starting point in the feasible search space of the function.">proposeStartingPoint</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>        RealVector x(<a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#ade71ac99b993020d10de6a1f87e17a21" title="Accesses the number of variables.">numberOfVariables</a>());</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span> </div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>        <span class="keywordflow">for</span> (std::size_t i = 0; i &lt; x.size(); i++) {</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>            x(i) = <a class="code hl_function" href="namespaceshark_1_1random.html#a18f302ea18f70835c59935973ba8ea84" title="Draws a number uniformly in [lower,upper] by drawing random numbers from rng.">random::uni</a>(*<a class="code hl_variable" href="classshark_1_1_abstract_objective_function.html#a6a27bddca6060f7861c49b05f8ec8435">mep_rng</a>, 0, 1);</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>        }</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>        <span class="keywordflow">return</span> x;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>    }</div>
</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span> </div>
<div class="foldopen" id="foldopen00078" data-start="{" data-end="}">
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a08c28c2dc2d89428b1882d5776e30ffe">   78</a></span>    <span class="keywordtype">double</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a08c28c2dc2d89428b1882d5776e30ffe" title="Evaluates the objective function for the supplied argument.">eval</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="classshark_1_1_abstract_objective_function.html#a59bfea031628e16737c66e7117eba7b5">SearchPointType</a> &amp;p)<span class="keyword"> const </span>{</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>        <a class="code hl_variable" href="classshark_1_1_abstract_objective_function.html#af0942c072be06d0dd4da5ee7067c5777" title="Evaluation counter, default value: 0.">m_evaluationCounter</a>++;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span> </div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>        <span class="keywordtype">double</span> sum = m_alpha * <a class="code hl_function" href="group__shark__globals.html#gae1f82613484173e9fe1a07960dabff63" title="Calculates x^2.">sqr</a>(p(0)) + <a class="code hl_function" href="group__shark__globals.html#gae1f82613484173e9fe1a07960dabff63" title="Calculates x^2.">sqr</a>(p(p.size() - 1));</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>        <span class="keywordtype">double</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">alpha</a> = ::sqrt(m_alpha);</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>        <span class="keywordflow">for</span> (std::size_t i = 1; i &lt; p.size()-1; i++)</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>            sum += <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">alpha</a> * <a class="code hl_function" href="group__shark__globals.html#gae1f82613484173e9fe1a07960dabff63" title="Calculates x^2.">sqr</a>(p(i));</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>        <span class="keywordflow">return</span> sum;</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>    }</div>
</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span> </div>
<div class="foldopen" id="foldopen00089" data-start="{" data-end="}">
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">   89</a></span>    <span class="keywordtype">double</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">alpha</a>()<span class="keyword"> const </span>{</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>        <span class="keywordflow">return</span> m_alpha;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>    }</div>
</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span> </div>
<div class="foldopen" id="foldopen00093" data-start="{" data-end="}">
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"><a class="line" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a08a1f1c629187707f07dac64b3a6fca0">   93</a></span>    <span class="keywordtype">void</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a08a1f1c629187707f07dac64b3a6fca0">setAlpha</a>(<span class="keywordtype">double</span> <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">alpha</a>) {</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>        m_alpha = <a class="code hl_function" href="classshark_1_1benchmarks_1_1_cigar_discus.html#a60e96d8546b196dea69e0b2299f77723">alpha</a>;</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>    }</div>
</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span> </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>    <span class="keywordtype">double</span> m_alpha;</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>    std::size_t m_numberOfVariables;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>};</div>
</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>}}</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span> </div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span><span class="preprocessor">#endif</span></div>
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